Automatic gate



(No Model.) I J..O. ROCK.

7 AUTOMATIC GATE.

No. 359,404. Patented Mar. 15, 1887.

Fig. I. 4

N. PETERS. Pholwlilhcgraphgn Wflshi C.

UNITED STATES PATENT OFFICE.

' JOHN 0. BOOK, OF WEST LIBERTY, OHIO.

AUTOMATIC GATE.

SPECIFICATION forming part of Letters Patent No. 359,404, dated March 15, 1887,

(No model.)

To all whom it may concern:

Be it known that I, J 01m 0. BOOK, a citizen of the United States, and a resident of West Liberty, in the county of Logan and vState of Ohio, have invented a new and useful Automatic Gate, of which the following is a specification. v

My invention relates to improvements in automatic drive-gates, and to the manner of adjusting the hinge so as to throw the gate out of plumb to open or shut it.

Figure 1 is a perspective view; Fig. 2, a top perspective of lowerhinge-plate; Fig. 3, a side view of trip-wheel and rod.

A is my gate; B, the post on which it is swung; O D, the upper hinges; E, the rear post of gate-frame; F, plate on the supporting-post having a V-shaped slot in its horizontal face; G, anL-shaped bolt, one end bolted into the rear post of the gate-frame and the other bent down to pass through the slot I. To the lower end of this arm are attached rods K, which pass to the pulleys L L and are fastened to pins 0 thereon. The pulleys L L are connected with the trips M by chains or rods Q, attached at one end to the pulleys at P and at the other to the trips. The horizontal arm of the bolt G does not rest on the plate F, but is raisedsomewhat above it to prevent snow or ice from interfering with it.

The construction and operation of my device areas follows: Any ordinary gate may be used. The gate is hung at its upper rear end to the supporting-postbyaneyeandbolt,ascommon. An ordinary bolt, G, is driven into or bolted into the rear post of the gate-frame, but inverted, the vertical arm of the bolt pointing downward instead of up. To the supporting-post B, I attach a plate or bracket bent at its middie at right angles to the post, and in this plate I make the V-shaped slot I. Through this slot I pass the vertical arm of bolt G. To this vertical arm I attach the rods K. These rods are attached to the pulleys L L, which are attached to the trips by rods Q. The normal position of the inverted arm of bolt G when the gate is closed is at the point or apex of the V-shaped slot, with the trip M standing vertically.

When a vehicle-wheel runs against the trip H when-going toward the gate, it depresses the trip and revolves the pulley backward, drawing the vertical arm of bolt G along to the open end of the slot I in the plate F, throwing the gate out of plumb, raising its front end, and causing it to swing open away from the team. A catch on the bumper-post detains it until the vehicle has passed through, when the wheel strikes the trip on the other side going out and pulls the vertical arm of bolt G back to its first position, throwing the gate outof plumb again, when it closes ot'its own gravity. At the point of the V the vertical'arm of the bolt strikes against the side of the opposite arm of the V and is stopped.

I am aware that the patents of Creighton and Dugdale show a plate mounted on the post having a triangular slot in which the pintle of the lower hinge plays, and do not claim the same, broadly, but only my particular construction, as shown and hereinafter claimed.

' What I claim is The combination, with a swinging gate, the lower pintle of which plays in a V-shaped slot formed in a supportingplate, F, of rodsK, connecting said pintle with pivoted disks L L, trip-irons M, and chains Q, by which the disks L L are connected to the trip-irons, the rods and chains being attached to'the disks at different points, all substantially as shown and described.

JOHN G. ROCK. 

